mirror of
https://github.com/splunk/security_content
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Bhavin Patel
95 lines
4.2 KiB
YAML
95 lines
4.2 KiB
YAML
name: Office Spawning Control
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id: 053e027c-10c7-11ec-8437-acde48001122
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version: 5
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date: '2024-05-11'
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author: Michael Haag, Splunk
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status: production
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type: TTP
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description: The following analytic identifies instances where `control.exe` is spawned
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by a Microsoft Office product. It leverages data from Endpoint Detection and Response
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(EDR) agents, focusing on process and parent process relationships. This activity
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is significant because it can indicate exploitation attempts related to CVE-2021-40444,
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where `control.exe` is used to execute malicious .cpl or .inf files. If confirmed
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malicious, this behavior could allow an attacker to execute arbitrary code, potentially
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leading to system compromise, data exfiltration, or further lateral movement within
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the network.
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data_source:
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- Sysmon EventID 1
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where Processes.parent_process_name
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IN ("winword.exe","excel.exe","powerpnt.exe","mspub.exe","visio.exe","wordpad.exe","wordview.exe","onenote.exe","onenotem.exe","onenoteviewer.exe","onenoteim.exe","msaccess.exe")
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Processes.process_name=control.exe by Processes.dest Processes.user Processes.parent_process_name
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Processes.parent_process Processes.process_name Processes.process Processes.process_id
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Processes.parent_process_id | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`|
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`security_content_ctime(lastTime)`| `office_spawning_control_filter`'
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how_to_implement: The detection is based on data that originates from Endpoint Detection
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and Response (EDR) agents. These agents are designed to provide security-related
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telemetry from the endpoints where the agent is installed. To implement this search,
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you must ingest logs that contain the process GUID, process name, and parent process.
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Additionally, you must ingest complete command-line executions. These logs must
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be processed using the appropriate Splunk Technology Add-ons that are specific to
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the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint`
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data model. Use the Splunk Common Information Model (CIM) to normalize the field
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names and speed up the data modeling process.
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known_false_positives: Limited false positives should be present.
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references:
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- https://strontic.github.io/xcyclopedia/library/control.exe-1F13E714A0FEA8887707DFF49287996F.html
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- https://app.any.run/tasks/36c14029-9df8-439c-bba0-45f2643b0c70/
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- https://attack.mitre.org/techniques/T1218/011/
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- https://www.echotrail.io/insights/search/control.exe/
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- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.002/T1218.002.yaml
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- https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/trojanized-onenote-document-leads-to-formbook-malware/
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tags:
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analytic_story:
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- Spearphishing Attachments
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- Microsoft MSHTML Remote Code Execution CVE-2021-40444
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asset_type: Endpoint
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confidence: 100
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cve:
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- CVE-2021-40444
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impact: 80
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$ clicking a suspicious attachment.
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mitre_attack_id:
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- T1566
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- T1566.001
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observable:
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- name: dest
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type: Hostname
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role:
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- Victim
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- name: parent_process_name
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type: Process
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role:
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- Parent Process
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- name: process_name
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type: Process
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role:
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- Child Process
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- Processes.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.original_file_name
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_path
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- Processes.process_path
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- Processes.parent_process_id
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risk_score: 80
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1566.001/macro/windows-sysmon_control.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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